Norman Maurer 8f7ef1cabb Skip execution of Channel*Handler method if annotated with @Skip and … (#8988) ... Motivation: Invoking ChannelHandlers is not free and can result in some overhead when the ChannelPipeline becomes very long. This is especially true if most handlers will just forward the call to the next handler in the pipeline. When the user extends Channel*HandlerAdapter we can easily detect if can just skip the handler and invoke the next handler in the pipeline directly. This reduce the overhead of dispatch but also reduce the call-stack in many cases. This backports https://github.com/netty/netty/pull/8723 and https://github.com/netty/netty/pull/8987 to 4.1 Modifications: Detect if we can skip the handler when walking the pipeline. Result: Reduce overhead for long pipelines. Benchmark (extraHandlers) Mode Cnt Score Error Units DefaultChannelPipelineBenchmark.propagateEventOld 4 thrpt 10 267313.031 ± 9131.140 ops/s DefaultChannelPipelineBenchmark.propagateEvent 4 thrpt 10 824825.673 ± 12727.594 ops/s		2019-04-09 09:36:52 +02:00
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bootstrap	Fail fast when DefaultChannelPromise is constructed with null as Channel.	2018-01-18 18:57:42 +00:00
channel	Skip execution of Channel*Handler method if annotated with @Skip and … (#8988)	2019-04-09 09:36:52 +02:00